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39 lines
857 B
39 lines
857 B
#!/bin/env python3
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import gex
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import time
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# this shows a spinny animation on a 30-pixel strip forming a circle
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def draw_comet(buf, index):
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r = 0xFF
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g = 0x22
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b = 0x00
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steps = 5
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fades = [0.05, 1, 0.5, 0.1, 0.05]
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for i in range(steps):
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fade = fades[i]
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buf[(len(buf) + index - i)%len(buf)] = \
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round(r * fade)<<16 | \
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round(g * fade)<<8 | \
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round(b * fade)
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with gex.Client(gex.TrxRawUSB()) as client:
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# Neopixel strip
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strip = gex.Neopixel(client, 'npx')
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markers = [0, 15]
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for i in range(1000):
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buf = [0]*30
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for j in range(len(markers)):
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n = markers[j]
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draw_comet(buf, n)
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n = n + 1 if n < len(buf)-1 else 0
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markers[j] = n
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strip.load(buf)
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time.sleep(0.02)
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strip.clear()
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